ESTIMATE NET GREENHOUSE GAS BENEFITS FROM APPLYING COMPOST TO CROPLAND AND GRASSLAND

The Compost-Planner tool is now available to estimate the net GHG benefits of specific compost application practices to California cropland and grassland. This tool is based on a quantification methodology developed by the California Air Resources Board (CARB) for the California Department of Food and Agriculture’s (CDFA) Healthy Soils Incentive Program. These practices are based on compost application rates developed for use in California, and on input from the Environmental Farming Act – Science Advisory Panel convened by CDFA. The findings are published in the paper “Compost Application Rates for California Croplands and Rangelands for a CDFA Healthy Soils Incentive Program”.
Begin by naming your project and selecting your county
Select a Compost Practice/Land Use
Annual Crops
Perennials, Orchards and Vineyards
Grasslands
Select a Compost Practice Application
Enter the acreage associated with each Compost Application Practice you selected
Approximate Carbon Sequestration and Greenhouse Gas Emission Reductions1
(tonnes CO2 equivalent per year)
Enter Acreage Carbon Dioxide
Nitrous Oxide
Methane
Total CO2-
Equivalent
Compost Application Practice
Total 0.00 0.00 0.00 0.00
1Negative values indicate a loss of carbon or increased emissions of greenhouse gases
How are your carbon sequestration and greenhouse gas emission reduction estimates calculated?
CARB has developed emission reduction coefficients using the DeNitrification-DeComposition Model (DNDC), a biogeochemical model, to estimate net GHG benefits from compost application to cropland and grassland throughout California. A description of the DNDC modeling is included as an appendix to the quantification methodology. Net GHG benefits indicate changes in carbon stocks less any fluxes of nitrous oxide or methane that may result from practice implementation. Estimates represent field emissions only and do not include off site emissions, such as those from manufacturing, processing, transportation, or farm equipment.
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Each emission reduction is calculated using the following equation:

Emission reduction = Area (acres) * Emission Reduction Coefficient (ERC)
Emission Reduction Coefficients (ERC)
(tonnes CO2 equivalent per acre per year)
Greenhouse Gases
Carbon Dioxide
(CO2)
Nitrous Oxide
(N2O)
Methane
(CH4)
Compost Application Practice
Designed Use of Compost-Planner
This evaluation tool was designed to provide California-specific estimates of net GHG impacts of compost application practices for CDFA’s Healthy Soils Incentive Program, funded by California Climate Investments for fiscal year 2016-2017.
For inquiries regarding Compost-Planner please contact (GGRFProgram@arb.ca.gov) . Information on the Healthy Soils Incentive Program is available at: https://www.cdfa.ca.gov/oefi/healthysoils/